/* Time module */#include "Python.h"#include "_time.h"#define TZNAME_ENCODING "utf-8"#include <ctype.h>#ifdef HAVE_SYS_TYPES_H#include <sys/types.h>#endif /* HAVE_SYS_TYPES_H */#ifdef QUICKWIN#include <io.h>#endif#if defined(__WATCOMC__) && !defined(__QNX__)#include <i86.h>#else#ifdef MS_WINDOWS#define WIN32_LEAN_AND_MEAN#include <windows.h>#include "pythread.h"/* helper to allow us to interrupt sleep() on Windows*/staticHANDLEhInterruptEvent=NULL;staticBOOLWINAPIPyCtrlHandler(DWORDdwCtrlType){SetEvent(hInterruptEvent);/* allow other default handlers to be called. Default Python handler will setup the KeyboardInterrupt exception. */returnFALSE;}staticlongmain_thread;#if defined(__BORLANDC__)/* These overrides not needed for Win32 */#define timezone _timezone#define tzname _tzname#define daylight _daylight#endif /* __BORLANDC__ */#endif /* MS_WINDOWS */#endif /* !__WATCOMC__ || __QNX__ */#if defined(MS_WINDOWS) && !defined(__BORLANDC__)/* Win32 has better clock replacement; we have our own version below. */#undef HAVE_CLOCK#undef TZNAME_ENCODING#define TZNAME_ENCODING "mbcs"#endif /* MS_WINDOWS && !defined(__BORLANDC__) */#if defined(PYOS_OS2)#define INCL_DOS#define INCL_ERRORS#include <os2.h>#endif#if defined(PYCC_VACPP)#include <sys/time.h>#endif/* Forward declarations */staticintfloatsleep(double);staticdoublefloattime(void);/* For Y2K check */staticPyObject*moddict;staticPyObject*time_time(PyObject*self,PyObject*unused){doublesecs;secs=floattime();if(secs==0.0){PyErr_SetFromErrno(PyExc_IOError);returnNULL;}returnPyFloat_FromDouble(secs);}PyDoc_STRVAR(time_doc,"time() -> floating point number\n\\n\Return the current time in seconds since the Epoch.\n\Fractions of a second may be present if the system clock provides them.");#ifdef HAVE_CLOCK#ifndef CLOCKS_PER_SEC#ifdef CLK_TCK#define CLOCKS_PER_SEC CLK_TCK#else#define CLOCKS_PER_SEC 1000000#endif#endifstaticPyObject*time_clock(PyObject*self,PyObject*unused){returnPyFloat_FromDouble(((double)clock())/CLOCKS_PER_SEC);}#endif /* HAVE_CLOCK */#if defined(MS_WINDOWS) && !defined(__BORLANDC__)/* Due to Mark Hammond and Tim Peters */staticPyObject*time_clock(PyObject*self,PyObject*unused){staticLARGE_INTEGERctrStart;staticdoubledivisor=0.0;LARGE_INTEGERnow;doublediff;if(divisor==0.0){LARGE_INTEGERfreq;QueryPerformanceCounter(&ctrStart);if(!QueryPerformanceFrequency(&freq)||freq.QuadPart==0){/* Unlikely to happen - this works on all intel machines at least! Revert to clock() */returnPyFloat_FromDouble(((double)clock())/CLOCKS_PER_SEC);}divisor=(double)freq.QuadPart;}QueryPerformanceCounter(&now);diff=(double)(now.QuadPart-ctrStart.QuadPart);returnPyFloat_FromDouble(diff/divisor);}#define HAVE_CLOCK /* So it gets included in the methods */#endif /* MS_WINDOWS && !defined(__BORLANDC__) */#ifdef HAVE_CLOCKPyDoc_STRVAR(clock_doc,"clock() -> floating point number\n\\n\Return the CPU time or real time since the start of the process or since\n\the first call to clock(). This has as much precision as the system\n\records.");#endifstaticPyObject*time_sleep(PyObject*self,PyObject*args){doublesecs;if(!PyArg_ParseTuple(args,"d:sleep",&secs))returnNULL;if(floatsleep(secs)!=0)returnNULL;Py_INCREF(Py_None);returnPy_None;}PyDoc_STRVAR(sleep_doc,"sleep(seconds)\n\\n\Delay execution for a given number of seconds. The argument may be\n\a floating point number for subsecond precision.");staticPyStructSequence_Fieldstruct_time_type_fields[]={{"tm_year","year, for example, 1993"},{"tm_mon","month of year, range [1, 12]"},{"tm_mday","day of month, range [1, 31]"},{"tm_hour","hours, range [0, 23]"},{"tm_min","minutes, range [0, 59]"},{"tm_sec","seconds, range [0, 61])"},{"tm_wday","day of week, range [0, 6], Monday is 0"},{"tm_yday","day of year, range [1, 366]"},{"tm_isdst","1 if summer time is in effect, 0 if not, and -1 if unknown"},{0}};staticPyStructSequence_Descstruct_time_type_desc={"time.struct_time","The time value as returned by gmtime(), localtime(), and strptime(), and\n"" accepted by asctime(), mktime() and strftime(). May be considered as a\n"" sequence of 9 integers.\n\n"" Note that several fields' values are not the same as those defined by\n"" the C language standard for struct tm. For example, the value of the\n"" field tm_year is the actual year, not year - 1900. See individual\n"" fields' descriptions for details.",struct_time_type_fields,9,};staticintinitialized;staticPyTypeObjectStructTimeType;staticPyObject*tmtotuple(structtm*p){PyObject*v=PyStructSequence_New(&StructTimeType);if(v==NULL)returnNULL;#define SET(i,val) PyStructSequence_SET_ITEM(v, i, PyLong_FromLong((long) val))SET(0,p->tm_year+1900);SET(1,p->tm_mon+1);/* Want January == 1 */SET(2,p->tm_mday);SET(3,p->tm_hour);SET(4,p->tm_min);SET(5,p->tm_sec);SET(6,(p->tm_wday+6)%7);/* Want Monday == 0 */SET(7,p->tm_yday+1);/* Want January, 1 == 1 */SET(8,p->tm_isdst);#undef SETif(PyErr_Occurred()){Py_XDECREF(v);returnNULL;}returnv;}staticPyObject*time_convert(doublewhen,structtm*(*function)(consttime_t*)){structtm*p;time_twhent=_PyTime_DoubleToTimet(when);if(whent==(time_t)-1&&PyErr_Occurred())returnNULL;errno=0;p=function(&whent);if(p==NULL){#ifdef EINVALif(errno==0)errno=EINVAL;#endifreturnPyErr_SetFromErrno(PyExc_ValueError);}returntmtotuple(p);}/* Parse arg tuple that can contain an optional float-or-None value; format needs to be "|O:name". Returns non-zero on success (parallels PyArg_ParseTuple).*/staticintparse_time_double_args(PyObject*args,char*format,double*pwhen){PyObject*ot=NULL;if(!PyArg_ParseTuple(args,format,&ot))return0;if(ot==NULL||ot==Py_None)*pwhen=floattime();else{doublewhen=PyFloat_AsDouble(ot);if(PyErr_Occurred())return0;*pwhen=when;}return1;}staticPyObject*time_gmtime(PyObject*self,PyObject*args){doublewhen;if(!parse_time_double_args(args,"|O:gmtime",&when))returnNULL;returntime_convert(when,gmtime);}PyDoc_STRVAR(gmtime_doc,"gmtime([seconds]) -> (tm_year, tm_mon, tm_mday, tm_hour, tm_min,\n\ tm_sec, tm_wday, tm_yday, tm_isdst)\n\\n\Convert seconds since the Epoch to a time tuple expressing UTC (a.k.a.\n\GMT). When 'seconds' is not passed in, convert the current time instead.");staticPyObject*time_localtime(PyObject*self,PyObject*args){doublewhen;if(!parse_time_double_args(args,"|O:localtime",&when))returnNULL;returntime_convert(when,localtime);}PyDoc_STRVAR(localtime_doc,"localtime([seconds]) -> (tm_year,tm_mon,tm_mday,tm_hour,tm_min,\n\ tm_sec,tm_wday,tm_yday,tm_isdst)\n\\n\Convert seconds since the Epoch to a time tuple expressing local time.\n\When 'seconds' is not passed in, convert the current time instead.");/* Convert 9-item tuple to tm structure. Return 1 on success, set * an exception and return 0 on error. */staticintgettmarg(PyObject*args,structtm*p){inty;memset((void*)p,'\0',sizeof(structtm));if(!PyTuple_Check(args)){PyErr_SetString(PyExc_TypeError,"Tuple or struct_time argument required");return0;}if(!PyArg_ParseTuple(args,"iiiiiiiii",&y,&p->tm_mon,&p->tm_mday,&p->tm_hour,&p->tm_min,&p->tm_sec,&p->tm_wday,&p->tm_yday,&p->tm_isdst))return0;/* If year is specified with less than 4 digits, its interpretation * depends on the accept2dyear value. * * If accept2dyear is true (default), a backward compatibility behavior is * invoked as follows: * * - for 2-digit year, century is guessed according to POSIX rules for * %y strptime format: 21st century for y < 69, 20th century * otherwise. A deprecation warning is issued when century * information is guessed in this way. * * - for 3-digit or negative year, a ValueError exception is raised. * * If accept2dyear is false (set by the program or as a result of a * non-empty value assigned to PYTHONY2K environment variable) all year * values are interpreted as given. */if(y<1000){PyObject*accept=PyDict_GetItemString(moddict,"accept2dyear");if(accept!=NULL){intacceptval=PyObject_IsTrue(accept);if(acceptval==-1)return0;if(acceptval){if(0<=y&&y<69)y+=2000;elseif(69<=y&&y<100)y+=1900;else{PyErr_SetString(PyExc_ValueError,"year out of range");return0;}if(PyErr_WarnEx(PyExc_DeprecationWarning,"Century info guessed for a 2-digit year.",1)!=0)return0;}}elsereturn0;}p->tm_year=y-1900;p->tm_mon--;p->tm_wday=(p->tm_wday+1)%7;p->tm_yday--;return1;}/* Check values of the struct tm fields before it is passed to strftime() and * asctime(). Return 1 if all values are valid, otherwise set an exception * and returns 0. */staticintchecktm(structtm*buf){/* Checks added to make sure strftime() and asctime() does not crash Python by indexing blindly into some array for a textual representation by some bad index (fixes bug #897625 and #6608). Also support values of zero from Python code for arguments in which that is out of range by forcing that value to the lowest value that is valid (fixed bug #1520914). Valid ranges based on what is allowed in struct tm: - tm_year: [0, max(int)] (1) - tm_mon: [0, 11] (2) - tm_mday: [1, 31] - tm_hour: [0, 23] - tm_min: [0, 59] - tm_sec: [0, 60] - tm_wday: [0, 6] (1) - tm_yday: [0, 365] (2) - tm_isdst: [-max(int), max(int)] (1) gettmarg() handles bounds-checking. (2) Python's acceptable range is one greater than the range in C, thus need to check against automatic decrement by gettmarg(). */if(buf->tm_mon==-1)buf->tm_mon=0;elseif(buf->tm_mon<0||buf->tm_mon>11){PyErr_SetString(PyExc_ValueError,"month out of range");return0;}if(buf->tm_mday==0)buf->tm_mday=1;elseif(buf->tm_mday<0||buf->tm_mday>31){PyErr_SetString(PyExc_ValueError,"day of month out of range");return0;}if(buf->tm_hour<0||buf->tm_hour>23){PyErr_SetString(PyExc_ValueError,"hour out of range");return0;}if(buf->tm_min<0||buf->tm_min>59){PyErr_SetString(PyExc_ValueError,"minute out of range");return0;}if(buf->tm_sec<0||buf->tm_sec>61){PyErr_SetString(PyExc_ValueError,"seconds out of range");return0;}/* tm_wday does not need checking of its upper-bound since taking ``% 7`` in gettmarg() automatically restricts the range. */if(buf->tm_wday<0){PyErr_SetString(PyExc_ValueError,"day of week out of range");return0;}if(buf->tm_yday==-1)buf->tm_yday=0;elseif(buf->tm_yday<0||buf->tm_yday>365){PyErr_SetString(PyExc_ValueError,"day of year out of range");return0;}return1;}#ifdef HAVE_STRFTIME#ifdef HAVE_WCSFTIME#define time_char wchar_t#define format_time wcsftime#define time_strlen wcslen#else#define time_char char#define format_time strftime#define time_strlen strlen#endifstaticPyObject*time_strftime(PyObject*self,PyObject*args){PyObject*tup=NULL;structtmbuf;consttime_char*fmt;#ifdef HAVE_WCSFTIMEwchar_t*format;#elsePyObject*format;#endifPyObject*format_arg;size_tfmtlen,buflen;time_char*outbuf=NULL;size_ti;PyObject*ret=NULL;memset((void*)&buf,'\0',sizeof(buf));/* Will always expect a unicode string to be passed as format. Given that there's no str type anymore in py3k this seems safe. */if(!PyArg_ParseTuple(args,"U|O:strftime",&format_arg,&tup))returnNULL;if(tup==NULL){time_ttt=time(NULL);buf=*localtime(&tt);}elseif(!gettmarg(tup,&buf)||!checktm(&buf))returnNULL;#if defined(_MSC_VER) || defined(sun)if(buf.tm_year+1900<1||9999<buf.tm_year+1900){PyErr_Format(PyExc_ValueError,"strftime() requires year in [1; 9999]",buf.tm_year+1900);returnNULL;}#endif/* Normalize tm_isdst just in case someone foolishly implements %Z based on the assumption that tm_isdst falls within the range of [-1, 1] */if(buf.tm_isdst<-1)buf.tm_isdst=-1;elseif(buf.tm_isdst>1)buf.tm_isdst=1;#ifdef HAVE_WCSFTIMEformat=PyUnicode_AsWideCharString(format_arg,NULL);if(format==NULL)returnNULL;fmt=format;#else/* Convert the unicode string to an ascii one */format=PyUnicode_AsEncodedString(format_arg,TZNAME_ENCODING,NULL);if(format==NULL)returnNULL;fmt=PyBytes_AS_STRING(format);#endif#if defined(MS_WINDOWS) && defined(HAVE_WCSFTIME)/* check that the format string contains only valid directives */for(outbuf=wcschr(fmt,L'%');outbuf!=NULL;outbuf=wcschr(outbuf+2,L'%')){if(outbuf[1]=='#')++outbuf;/* not documented by python, */if(outbuf[1]=='\0'||!wcschr(L"aAbBcdfHIjmMpSUwWxXyYzZ%",outbuf[1])){PyErr_SetString(PyExc_ValueError,"Invalid format string");return0;}}#endiffmtlen=time_strlen(fmt);/* I hate these functions that presume you know how big the output * will be ahead of time... */for(i=1024;;i+=i){outbuf=(time_char*)PyMem_Malloc(i*sizeof(time_char));if(outbuf==NULL){PyErr_NoMemory();break;}buflen=format_time(outbuf,i,fmt,&buf);if(buflen>0||i>=256*fmtlen){/* If the buffer is 256 times as long as the format, it's probably not failing for lack of room! More likely, the format yields an empty result, e.g. an empty format, or %Z when the timezone is unknown. */#ifdef HAVE_WCSFTIMEret=PyUnicode_FromWideChar(outbuf,buflen);#elseret=PyUnicode_Decode(outbuf,buflen,TZNAME_ENCODING,NULL);#endifPyMem_Free(outbuf);break;}PyMem_Free(outbuf);#if defined _MSC_VER && _MSC_VER >= 1400 && defined(__STDC_SECURE_LIB__)/* VisualStudio .NET 2005 does this properly */if(buflen==0&&errno==EINVAL){PyErr_SetString(PyExc_ValueError,"Invalid format string");break;}#endif}#ifdef HAVE_WCSFTIMEPyMem_Free(format);#elsePy_DECREF(format);#endifreturnret;}#undef time_char#undef format_timePyDoc_STRVAR(strftime_doc,"strftime(format[, tuple]) -> string\n\\n\Convert a time tuple to a string according to a format specification.\n\See the library reference manual for formatting codes. When the time tuple\n\is not present, current time as returned by localtime() is used.");#endif /* HAVE_STRFTIME */staticPyObject*time_strptime(PyObject*self,PyObject*args){PyObject*strptime_module=PyImport_ImportModuleNoBlock("_strptime");PyObject*strptime_result;if(!strptime_module)returnNULL;strptime_result=PyObject_CallMethod(strptime_module,"_strptime_time","O",args);Py_DECREF(strptime_module);returnstrptime_result;}PyDoc_STRVAR(strptime_doc,"strptime(string, format) -> struct_time\n\\n\Parse a string to a time tuple according to a format specification.\n\See the library reference manual for formatting codes (same as strftime()).");staticPyObject*_asctime(structtm*timeptr){/* Inspired by Open Group reference implementation available at * http://pubs.opengroup.org/onlinepubs/009695399/functions/asctime.html */staticcharwday_name[7][3]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};staticcharmon_name[12][3]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};charbuf[20];/* 'Sun Sep 16 01:03:52\0' */intn;n=PyOS_snprintf(buf,sizeof(buf),"%.3s %.3s%3d %.2d:%.2d:%.2d",wday_name[timeptr->tm_wday],mon_name[timeptr->tm_mon],timeptr->tm_mday,timeptr->tm_hour,timeptr->tm_min,timeptr->tm_sec);/* XXX: since the fields used by snprintf above are validated in checktm, * the following condition should never trigger. We keep the check because * historically fixed size buffer used in asctime was the source of * crashes. */if(n+1!=sizeof(buf)){PyErr_SetString(PyExc_ValueError,"unconvertible time");returnNULL;}returnPyUnicode_FromFormat("%s %d",buf,1900+timeptr->tm_year);}staticPyObject*time_asctime(PyObject*self,PyObject*args){PyObject*tup=NULL;structtmbuf;if(!PyArg_UnpackTuple(args,"asctime",0,1,&tup))returnNULL;if(tup==NULL){time_ttt=time(NULL);buf=*localtime(&tt);}elseif(!gettmarg(tup,&buf)||!checktm(&buf))returnNULL;return_asctime(&buf);}PyDoc_STRVAR(asctime_doc,"asctime([tuple]) -> string\n\\n\Convert a time tuple to a string, e.g. 'Sat Jun 06 16:26:11 1998'.\n\When the time tuple is not present, current time as returned by localtime()\n\is used.");staticPyObject*time_ctime(PyObject*self,PyObject*args){PyObject*ot=NULL;time_ttt;structtm*timeptr;if(!PyArg_UnpackTuple(args,"ctime",0,1,&ot))returnNULL;if(ot==NULL||ot==Py_None)tt=time(NULL);else{doubledt=PyFloat_AsDouble(ot);if(PyErr_Occurred())returnNULL;tt=_PyTime_DoubleToTimet(dt);if(tt==(time_t)-1&&PyErr_Occurred())returnNULL;}timeptr=localtime(&tt);if(timeptr==NULL){PyErr_SetString(PyExc_ValueError,"unconvertible time");returnNULL;}return_asctime(timeptr);}PyDoc_STRVAR(ctime_doc,"ctime(seconds) -> string\n\\n\Convert a time in seconds since the Epoch to a string in local time.\n\This is equivalent to asctime(localtime(seconds)). When the time tuple is\n\not present, current time as returned by localtime() is used.");#ifdef HAVE_MKTIMEstaticPyObject*time_mktime(PyObject*self,PyObject*tup){structtmbuf;time_ttt;if(!gettmarg(tup,&buf))returnNULL;buf.tm_wday=-1;/* sentinel; original value ignored */tt=mktime(&buf);/* Return value of -1 does not necessarily mean an error, but tm_wday * cannot remain set to -1 if mktime succedded. */if(tt==(time_t)(-1)&&buf.tm_wday==-1){PyErr_SetString(PyExc_OverflowError,"mktime argument out of range");returnNULL;}returnPyFloat_FromDouble((double)tt);}PyDoc_STRVAR(mktime_doc,"mktime(tuple) -> floating point number\n\\n\Convert a time tuple in local time to seconds since the Epoch.");#endif /* HAVE_MKTIME */#ifdef HAVE_WORKING_TZSETstaticvoidPyInit_timezone(PyObject*module);staticPyObject*time_tzset(PyObject*self,PyObject*unused){PyObject*m;m=PyImport_ImportModuleNoBlock("time");if(m==NULL){returnNULL;}tzset();/* Reset timezone, altzone, daylight and tzname */PyInit_timezone(m);Py_DECREF(m);Py_INCREF(Py_None);returnPy_None;}PyDoc_STRVAR(tzset_doc,"tzset()\n\\n\Initialize, or reinitialize, the local timezone to the value stored in\n\os.environ['TZ']. The TZ environment variable should be specified in\n\standard Unix timezone format as documented in the tzset man page\n\(eg. 'US/Eastern', 'Europe/Amsterdam'). Unknown timezones will silently\n\fall back to UTC. If the TZ environment variable is not set, the local\n\timezone is set to the systems best guess of wallclock time.\n\Changing the TZ environment variable without calling tzset *may* change\n\the local timezone used by methods such as localtime, but this behaviour\n\should not be relied on.");#endif /* HAVE_WORKING_TZSET */staticvoidPyInit_timezone(PyObject*m){/* This code moved from PyInit_time wholesale to allow calling it from time_tzset. In the future, some parts of it can be moved back (for platforms that don't HAVE_WORKING_TZSET, when we know what they are), and the extraneous calls to tzset(3) should be removed. I haven't done this yet, as I don't want to change this code as little as possible when introducing the time.tzset and time.tzsetwall methods. This should simply be a method of doing the following once, at the top of this function and removing the call to tzset() from time_tzset(): #ifdef HAVE_TZSET tzset() #endif And I'm lazy and hate C so nyer. */#if defined(HAVE_TZNAME) && !defined(__GLIBC__) && !defined(__CYGWIN__)PyObject*otz0,*otz1;tzset();#ifdef PYOS_OS2PyModule_AddIntConstant(m,"timezone",_timezone);#else /* !PYOS_OS2 */PyModule_AddIntConstant(m,"timezone",timezone);#endif /* PYOS_OS2 */#ifdef HAVE_ALTZONEPyModule_AddIntConstant(m,"altzone",altzone);#else#ifdef PYOS_OS2PyModule_AddIntConstant(m,"altzone",_timezone-3600);#else /* !PYOS_OS2 */PyModule_AddIntConstant(m,"altzone",timezone-3600);#endif /* PYOS_OS2 */#endifPyModule_AddIntConstant(m,"daylight",daylight);otz0=PyUnicode_Decode(tzname[0],strlen(tzname[0]),TZNAME_ENCODING,NULL);otz1=PyUnicode_Decode(tzname[1],strlen(tzname[1]),TZNAME_ENCODING,NULL);PyModule_AddObject(m,"tzname",Py_BuildValue("(NN)",otz0,otz1));#else /* !HAVE_TZNAME || __GLIBC__ || __CYGWIN__*/#ifdef HAVE_STRUCT_TM_TM_ZONE{#define YEAR ((time_t)((365 * 24 + 6) * 3600))time_tt;structtm*p;longjanzone,julyzone;charjanname[10],julyname[10];t=(time((time_t*)0)/YEAR)*YEAR;p=localtime(&t);janzone=-p->tm_gmtoff;strncpy(janname,p->tm_zone?p->tm_zone:" ",9);janname[9]='\0';t+=YEAR/2;p=localtime(&t);julyzone=-p->tm_gmtoff;strncpy(julyname,p->tm_zone?p->tm_zone:" ",9);julyname[9]='\0';if(janzone<julyzone){/* DST is reversed in the southern hemisphere */PyModule_AddIntConstant(m,"timezone",julyzone);PyModule_AddIntConstant(m,"altzone",janzone);PyModule_AddIntConstant(m,"daylight",janzone!=julyzone);PyModule_AddObject(m,"tzname",Py_BuildValue("(zz)",julyname,janname));}else{PyModule_AddIntConstant(m,"timezone",janzone);PyModule_AddIntConstant(m,"altzone",julyzone);PyModule_AddIntConstant(m,"daylight",janzone!=julyzone);PyModule_AddObject(m,"tzname",Py_BuildValue("(zz)",janname,julyname));}}#else#endif /* HAVE_STRUCT_TM_TM_ZONE */#ifdef __CYGWIN__tzset();PyModule_AddIntConstant(m,"timezone",_timezone);PyModule_AddIntConstant(m,"altzone",_timezone-3600);PyModule_AddIntConstant(m,"daylight",_daylight);PyModule_AddObject(m,"tzname",Py_BuildValue("(zz)",_tzname[0],_tzname[1]));#endif /* __CYGWIN__ */#endif /* !HAVE_TZNAME || __GLIBC__ || __CYGWIN__*/}staticPyMethodDeftime_methods[]={{"time",time_time,METH_NOARGS,time_doc},#ifdef HAVE_CLOCK{"clock",time_clock,METH_NOARGS,clock_doc},#endif{"sleep",time_sleep,METH_VARARGS,sleep_doc},{"gmtime",time_gmtime,METH_VARARGS,gmtime_doc},{"localtime",time_localtime,METH_VARARGS,localtime_doc},{"asctime",time_asctime,METH_VARARGS,asctime_doc},{"ctime",time_ctime,METH_VARARGS,ctime_doc},#ifdef HAVE_MKTIME{"mktime",time_mktime,METH_O,mktime_doc},#endif#ifdef HAVE_STRFTIME{"strftime",time_strftime,METH_VARARGS,strftime_doc},#endif{"strptime",time_strptime,METH_VARARGS,strptime_doc},#ifdef HAVE_WORKING_TZSET{"tzset",time_tzset,METH_NOARGS,tzset_doc},#endif{NULL,NULL}/* sentinel */};PyDoc_STRVAR(module_doc,"This module provides various functions to manipulate time values.\n\\n\There are two standard representations of time. One is the number\n\of seconds since the Epoch, in UTC (a.k.a. GMT). It may be an integer\n\or a floating point number (to represent fractions of seconds).\n\The Epoch is system-defined; on Unix, it is generally January 1st, 1970.\n\The actual value can be retrieved by calling gmtime(0).\n\\n\The other representation is a tuple of 9 integers giving local time.\n\The tuple items are:\n\ year (four digits, e.g. 1998)\n\ month (1-12)\n\ day (1-31)\n\ hours (0-23)\n\ minutes (0-59)\n\ seconds (0-59)\n\ weekday (0-6, Monday is 0)\n\ Julian day (day in the year, 1-366)\n\ DST (Daylight Savings Time) flag (-1, 0 or 1)\n\If the DST flag is 0, the time is given in the regular time zone;\n\if it is 1, the time is given in the DST time zone;\n\if it is -1, mktime() should guess based on the date and time.\n\\n\Variables:\n\\n\timezone -- difference in seconds between UTC and local standard time\n\altzone -- difference in seconds between UTC and local DST time\n\daylight -- whether local time should reflect DST\n\tzname -- tuple of (standard time zone name, DST time zone name)\n\\n\Functions:\n\\n\time() -- return current time in seconds since the Epoch as a float\n\clock() -- return CPU time since process start as a float\n\sleep() -- delay for a number of seconds given as a float\n\gmtime() -- convert seconds since Epoch to UTC tuple\n\localtime() -- convert seconds since Epoch to local time tuple\n\asctime() -- convert time tuple to string\n\ctime() -- convert time in seconds to string\n\mktime() -- convert local time tuple to seconds since Epoch\n\strftime() -- convert time tuple to string according to format specification\n\strptime() -- parse string to time tuple according to format specification\n\tzset() -- change the local timezone");staticstructPyModuleDeftimemodule={PyModuleDef_HEAD_INIT,"time",module_doc,-1,time_methods,NULL,NULL,NULL,NULL};PyMODINIT_FUNCPyInit_time(void){PyObject*m;char*p;m=PyModule_Create(&timemodule);if(m==NULL)returnNULL;/* Accept 2-digit dates unless PYTHONY2K is set and non-empty */p=Py_GETENV("PYTHONY2K");PyModule_AddIntConstant(m,"accept2dyear",(long)(!p||!*p));/* Squirrel away the module's dictionary for the y2k check */moddict=PyModule_GetDict(m);Py_INCREF(moddict);/* Set, or reset, module variables like time.timezone */PyInit_timezone(m);#ifdef MS_WINDOWS/* Helper to allow interrupts for Windows. If Ctrl+C event delivered while not sleeping it will be ignored. */main_thread=PyThread_get_thread_ident();hInterruptEvent=CreateEvent(NULL,TRUE,FALSE,NULL);SetConsoleCtrlHandler(PyCtrlHandler,TRUE);#endif /* MS_WINDOWS */if(!initialized){PyStructSequence_InitType(&StructTimeType,&struct_time_type_desc);}Py_INCREF(&StructTimeType);PyModule_AddObject(m,"struct_time",(PyObject*)&StructTimeType);initialized=1;returnm;}staticdoublefloattime(void){_PyTime_timevalt;_PyTime_gettimeofday(&t);return(double)t.tv_sec+t.tv_usec*0.000001;}/* Implement floatsleep() for various platforms. When interrupted (or when another error occurs), return -1 and set an exception; else return 0. */staticintfloatsleep(doublesecs){/* XXX Should test for MS_WINDOWS first! */#if defined(HAVE_SELECT) && !defined(__EMX__)structtimevalt;doublefrac;frac=fmod(secs,1.0);secs=floor(secs);t.tv_sec=(long)secs;t.tv_usec=(long)(frac*1000000.0);Py_BEGIN_ALLOW_THREADSif(select(0,(fd_set*)0,(fd_set*)0,(fd_set*)0,&t)!=0){#ifdef EINTRif(errno!=EINTR){#elseif(1){#endifPy_BLOCK_THREADSPyErr_SetFromErrno(PyExc_IOError);return-1;}}Py_END_ALLOW_THREADS#elif defined(__WATCOMC__) && !defined(__QNX__)/* XXX Can't interrupt this sleep */Py_BEGIN_ALLOW_THREADSdelay((int)(secs*1000+0.5));/* delay() uses milliseconds */Py_END_ALLOW_THREADS#elif defined(MS_WINDOWS){doublemillisecs=secs*1000.0;unsignedlongul_millis;if(millisecs>(double)ULONG_MAX){PyErr_SetString(PyExc_OverflowError,"sleep length is too large");return-1;}Py_BEGIN_ALLOW_THREADS/* Allow sleep(0) to maintain win32 semantics, and as decreed * by Guido, only the main thread can be interrupted. */ul_millis=(unsignedlong)millisecs;if(ul_millis==0||main_thread!=PyThread_get_thread_ident())Sleep(ul_millis);else{DWORDrc;ResetEvent(hInterruptEvent);rc=WaitForSingleObject(hInterruptEvent,ul_millis);if(rc==WAIT_OBJECT_0){/* Yield to make sure real Python signal * handler called. */Sleep(1);Py_BLOCK_THREADSerrno=EINTR;PyErr_SetFromErrno(PyExc_IOError);return-1;}}Py_END_ALLOW_THREADS}#elif defined(PYOS_OS2)/* This Sleep *IS* Interruptable by Exceptions */Py_BEGIN_ALLOW_THREADSif(DosSleep(secs*1000)!=NO_ERROR){Py_BLOCK_THREADSPyErr_SetFromErrno(PyExc_IOError);return-1;}Py_END_ALLOW_THREADS#else/* XXX Can't interrupt this sleep */Py_BEGIN_ALLOW_THREADSsleep((int)secs);Py_END_ALLOW_THREADS#endifreturn0;}